How do you calculate the ROI of your marketing?
You divide the profit your marketing generates by what you invest in it. The art is not in the formula, but in honestly measuring which revenue really comes from which effort.
By Tanguy De Keyzer · Founder & digital strategist
At its core, the ROI of your marketing is simple to calculate: you take the extra profit your marketing generates, subtract its costs, and divide that by those same costs. The result tells you how much every invested euro returns. So the formula is not the hard part. The real challenge is honestly establishing which revenue genuinely comes from your marketing and not from chance, word of mouth or existing customers. Anyone who does not measure this cleanly ends up thinking they are richer or poorer than they are.
Which numbers do you need?
Four things form the base:
- Costs. Not just media budget, but also time, tools and agency fees.
- Revenue. The turnover, and preferably the profit, that comes from the customers you won.
- Conversion. How many leads become customers, so you know what a lead contributes.
- Time window. B2B deals often run for weeks or months, so measure over a fair period.
Link those numbers to clear KPIs and you see not only whether your marketing pays off, but also where.
Why is attribution the trickiest part?
Because a customer rarely comes in through a single channel. Someone sees an ad, reads an article later and only requests a quote weeks after. To which channel do you then attribute that customer? That is the core of attribution, and it determines whether your ROI number is correct. If you attribute everything to the last click, you underestimate the channels that do their work early in the journey, such as content. An honest calculation accounts for the whole journey, not just the last touchpoint.
What does Customer Impact steer on?
On profit contribution and revenue, not on vain intermediate metrics. Many reports show off impressions, clicks or followers, but those say nothing about return. We prefer to measure through into your pipeline: how many leads, how many customers, how much revenue, set against the investment. If you compare the outcome to your ROAS per channel, you see where your budget works hardest. We work in B2B, never for webshops, so we measure on the value of customers, not on traffic. Want a sharp view of your marketing ROI? Discover our reporting & data service or request a tailored analysis via our pricing.
Another question about your situation?
Ask away. You will get an honest, concrete answer from Tanguy himself.